IDTTM/ICSTM

56-pin CK505 w/Fully Integrated Voltage Regulator + Integrated Series Resistor

1125E—02/26/09

Advance Information

ICS9LPRS502

56-PIN CK505 W/FULLY INTEGRATED VOLTAGE REGULATOR + INTEGRATED SERIES RESISTOR

9

MLF Pin Description (Continued)

PIN #

PIN NAME

TYPE

DESCRIPTION

29

GNDSRC

PWR

Ground pin for SRC clocks.

30

SRCT3/CR#_C

I/O

True clock of differential SRC clock pair/ Clock Request control C for either SRC0 or SRC2 pair

The power-up default is SRCCLK3 output, but this pin may also be used as a Clock Request control of SRC pair 0

or SRC pair 2 via SMBus. Before configuring this pin as a Clock Request Pin, the SRC3 output must first be

disabled in byte 4, bit 7 of SMBus address space . After the SRC3 output is disabled, the pin can then be set to

serve as a Clock Request pin for either SRC pair 2 or pair 0 using the CR#_C_EN bit located in byte 5 of SMBUs

address space.

Byte 5, bit 3

0 = SRC3 enabled (default)

1= CR#_C enabled. Byte 5, bit 2 controls whether CR#_C controls SRC0 or SRC2 pair

Byte 5, bit 2

0 = CR#_C controls SRC0 pair (default),

1= CR#_C controls SRC2 pair

31

SRCC3/CR#_D

I/O

Complementary clock of differential SRC clock pair/ Clock Request control D for either SRC1 or SRC4 pair

The power-up default is SRCCLK3 output, but this pin may also be used as a Clock Request control of SRC pair 1

or SRC pair 4 via SMBus. Before configuring this pin as a Clock Request Pin, the SRC3 output must first be

disabled in byte 4, bit 7 of SMBus address space . After the SRC3 output is disabled, the pin can then be set to

serve as a Clock Request pin for either SRC pair 1 or pair 4 using the CR#_D_EN bit located in byte 5 of SMBUs

address space.

Byte 5, bit 1

0 = SRC3 enabled (default)

1= CR#_D enabled. Byte 5, bit 0 controls whether CR#_D controls SRC1 or SRC4 pair

Byte 5, bit 0

0 = CR#_D controls SRC1 pair (default),

1= CR#_D controls SRC4 pair

32

VDDSRC_IO

PWR

Power supply for SRC outputs. 1.05 to 3.3V +/-5%.

33

SRCT4

I/O

True clock of differential SRC clock pair 4

34

SRCC4

I/O

Complement clock of differential SRC clock pair 4

35

SRCC11

OUT

Complement clock of low power differential SRC clock pair.

36

SRCT11

OUT

True clock of low power differential SRC clock pair.

37

CPU_STOP#/SRCC5

I/O

Stops all CPU Clocks, except those set to be free running clocks /

Complement clock of differential SRC pair. The function of this pin is set up by the power-up strap on pin 6,

PCI4/SRC5_EN. The logic value sampled on pin 6 at power-up sets the function as follows:

0= CPU_STOP#

1 = SRC5

In AMT mode 3 bits are shifted in from the ICH to set the FSC, FSB, FSA values

38

PCI_STOP#/SRCT5

I/O

Stops all PCI Clocks, except those set to be free running clocks /

Complement clock of differential SRC pair. The function of this pin is set up by the power-up strap on pin 6,

PCI4/SRC5_EN. The logic value sampled on pin 6 at power-up sets the function as follows:

0= PCI_STOP#

1 = SRC5#

In AMT mode, this pin is a clock input which times the FSC, FSB, FSA bits shifted in on pin 37.

39

VDDSRC

PWR

VDD pin for SRC Pre-drivers, 3.3V nominal

40

GNDSRC

PWR

Ground for SRC clocks

41

SRCC7/CR#_E

I/O

SRC7 complement or Clock Request control E for SRC6 pair

The power-up default is SRC7#, but this pin may also be used as a Clock Request control of SRC6 via SMBus.

Before configuring this pin as a Clock Request Pin, the SRC7 output pair must first be disabled in byte 3, bit 3 of

SMBus configuration space . After the SRC output is disabled (high-Z), the pin can then be set to serve as a Clock

Request for SRC6 pair using byte 6, bit 7 of SMBus configuration space

Byte 6, bit 7

0 = SRC7# enabled (default)

1= CR#_E controls SRC6.

42

SRCT7/CR#_F

I/O

SRC7 true or Clock Request control 8 for SRC8 pair

The power-up default is SRC7, but this pin may also be used as a Clock Request control of SRC8 via SMBus.

Before configuring this pin as a Clock Request Pin, the SRC7 output pair must first be disabled in byte 3, bit 3 of

SMBus configuration space After the SRC output is disabled (high-Z), the pin can then be set to serve as a Clock

Request for SRC8 pair using byte 6, bit 6 of SMBus configuration space

Byte 6, bit 6

0 = SRC7# enabled (default)

1 = CR#_F controls SRC8.